Pump



Filed Dec. 43 M4 q2 F. D. HOFFMAN l PUMP 2 Sheets-Sheet 2 PATENT OFFICE.

FRED D. HOFFMAN, OF, KANSAS C'lrY, MISSOURI.

PUMP.

Application filed December My invention relates to pumps and moreparticularly to one adapted for delivering water from a shallow well,ditch or otherV body for irrigation purposes or for any purpose and in-any location wherein` a large Avolume of water is to be :delivered in acontinuous stream by a short lift, the principal object of the inventionbeing to efl'ect the pumping action with a minimum expenditureofmechanical power.

In accomplishing this and other objects of the invention I have providedimproved details of structure, the preferred forms of which areillustrated in the accompanying drawings wherein:

Fig. 1 is a side elevation of a pump embodying my improvements, partsbeing broken away and in section for better illustration.

Fig. 2 is a front .view ofthe pump,the visible air pump cylinder beingbroken away as in Fig. 1. i I,

Fig. 3 is a vertical section of a part of the pump head on the line 4-4of Fig. 4, particularly illustrating the cams for operating the walkingbeams.

Fig. 4 is a vertical section on the line 4 4-, Fig. 3. Y

Fig. 5 is a detail perspective view ofthe water pump rod connection. i Y

Fig. 6 is a detail perspective view of the y double rodconnection vwiththe main walking beam.

Fig. 7 is a detail sectional view of a portion of the pump, barrel,illustrating the 11ij ector nozzles. y

Referring more in detail to the drawings:

1 designates the platform of a pump head, located over the body of waterin which thepump is adapted to operate and from which is suspended, by aflange 2 and bolts 3 or the like, a pipe 4, through which water isdelivered from the pump tothe surface, the

upper portion of the pipe being omitted, asY

it may lead through the puinphead in any suitable manner and to anydesired location,

The pipe 4 extends to near the level ofthe.

water inthe well, and suspended from its lower end is an inverted,conical-shaped hood 5 having a ring-shaped lower end 6 provided with anoutstanding flange 7, the upper end of the cone and the lower end of thepipe 4V having outstanding flanges 4 and 5 connected by bolts 10 to rmlyattach the parts together, a gasket (not shown) being kpref-V 4erablyVinterposed betweenl the flanges to 7, 1925. Serial No. 73,710.

form a water tight joint, the narrow outlet at the top of the hoodforming a Venturi throat in which the flow of water is restrictedV inits travel tothe pipe 4. Suspended from the base of the hood 5, by bolts8 which extend through the hood fla-nge 7 and a flange 9 at the topthereof` is a-'Spider 11, comprising downwardly divergiiig, upwardlyconstricted tubular legs 11 and 12 having ports 13 andv 14 opening intothe base of the hood 5, and an intermediate tubular conduit 15 openingto the hood 5 between the ports 13 and 14 of the legs 11 and 12. Abovethe ports 13 and 14 are spiders 16 and 17 each comprising a guide 18 fora valve stein 19 carrying a valve 2O adapted to seat over and close theport 13 or 14 andV normally, yieldingly retained in its seat to closecommunication between the tubular leg and the interior of the hood by aspring 21 which bears against the guide 18' and against the `top of thevalve to normally, yieldingly retain the valve closed.

On each 0f the legs 11-12 isr an elbow 22 having a flange 23 at itsouterv end. Attached to the flange 23 by bolts 24 is a plate 25 having acentral port 26. On the outer 'face of the pla-te 25 is a spider 27carrying I a centralV guide 28 for al valve Stem 29 which extendsthrough the portf26 and carries aI valve 30 which seats outwardlyagainst the port 26 and is normally, yieldingly held in closed positionby a spring 31 which bears against the guide 28 and yagainst a button 32on the outer end of the stem, the valve being inwardly opening asdescribed in order to provide intake for liquid from the well under theconditions hereinafter described. Y

Suspended from the spider 11 is a lower spider 33 comprisingy barrels 34and 35 which communica-te with the .tubular legs 11 and 12 and aneck 36which communi- Cates with the hollow, standard'15, the spider 33 havingflanges 37, 38 and 39 surrounding the barrels land the standardrespectively, and -whereby the lower spider is secured to the upper onevby means of bolts 40; suitable gaskets or packing being interposedbetweenthe upper and lower parts to seal the lineV of communicationbetween the barrels and theupper spider legsA and between the yupper andlower lmembers ofthe hollow' standards. 'Slightly below itsupper end thesoy liquid to be taken into the -lower end of one of the pump memberswhile liquid is being delivered from the opposite end of the other pumpmember to the ldelivery conduit, reversal of the pistons inducingreversal of intake and discharge so that there is a continuous iow ofliquid from the pump into the delivery conduit.

Simultaneously with the operation of the liquid pump as described, theair pump rods k120 and 121 are raised and lowered in opposite relationto provide a continuous flow of air into the hollow standard 15 to drawliquid from an open pump outlet through the Venturi throat 41 anddeliver it into the hood 5 of the main conduit 4,' thereby inducing flowof the liquid through the delivery conduit.

With the arrangement described, there is simultaneous intake to the pumpfrom the upper intake of one barrel and the lower intake of the otherbarrel and exhaust from the lower outlet of the first barrel and upperoutlet of the second barrel tol provide a continuous supply to bothbarrels and an even continuous How through the delivery conduit; the airjets acting as boosters 'for the liquid and relieving the pump of partof its mechanical work. y

It is apparent that with apparatus constructed as described, acontinuous flow of liquid may be produced Lwith a minimum y expenditureof power and in a continuous stream. i

lVhat I claim and desire' to secure by Lety ters Patent is:

1. In a pump,'a delivery conduit, a pair of double acting pump members,each having separate outlets in communication with the delivery conduit,means rfor operating the pump members simultaneously in oppositedirections, a pair of air pumps in comconduit, outwardly opening valvescontrolling communication between the barrels and the delivery conduit,inwardly opening intake valves at opposite ends ofthe barrels, pistonsoperable in the barrels, actuating means yfor operating the pistonsoppositely, air pumps having separate communication with the deliveryconduit to directliuid pressure medium into said conduit in thedirection of delivery flow, and operative connection between the airpumps and the piston operating means to effect continuous flow of fluidfrom the pump barrels to the delivery conduit and a continuous flow ofpressure medium to said conduit for supplementing pumping action of thepistons. i

3. In a pump, separate barrels, each having primary and secondaryoutlets and an intermediate piston chamber, each barrel having an inletbetween the'piston chamber and each of the outlets, the outlet and inletat each side of the piston having normally yieldingly closed oppositelyopening valves, a conduit having direct communication with theV primaryoutlets of both of the barrels, and indirect communication with thesecondary outlets of both of the barrels, a walking beam, pistons in thebarrel cylinders operably connected with said beams, air rpumps operablyconnected with the said walking beam and communication between the airpumps and the delivery conduit. n

4. In a pump, a plurality of barrels having'valved inlets and outlets,and a delivery conduit in communication with the outlets, pistonsoperable in said barrels, a primary shaft, a walking beam'on said shaftoperably connected with the pistons, a pair of secondary shafts operablyconnected with the primary shaft, cams on the secondary shafts, a secondwalking beam operable by said cams, piston rods, a third walking beamoperably connected with the second beam,

air pumps having communication with the delivery conduit, and meansoperable by the third walking beam for actuating the air pumps.

In testimony whereof I affix my signature.

FRED D. HOFFMAN.

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